One and one half minus two and five six ths

-8

Step-by-step explanation:

1 1/2 - 2 5/6  (multiply the denominator by the whole number, then add with the numerator)

3/2 - 17/6  (get the common denominator which is 6 in this situation and multiply that with the numerator)

9/6 - 17/6 = -8

the correct answer is 828.07

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18